Bukkit

What steps will reproduce the problem?
1. Craft a Fire 3 wand
2. Find an area to test on.
3. Cast Fire Bolt on any block type it is capable of causing damage to.
4. Wait for the damage to repair itself.

What is the expected output? What do you see instead?
   Expected: The fire bolt blows an average size hole in the blocks and over time the fire is put out and the blocks regenerate.
   Instead: The fire bolt blows an average size hole in the blocks and no matter how long you wait the blocks never regenerate.

What version of the product are you using?
v1.62

Do you have an error log of what happened?
no

Please provide any additional information below.
Maybe the sand blocks that aren't destroyed fall into the hole and stop the timer?

My settings file:

messageoncast: true
messageonoutofrange: true
messageoncost: true
costitemid: xp
useworldguardregions: true
spelldamageundo: true
worlddamagetime: 30
universalcooldown: false
samewandset: true
samewandcooldown: false
disablespellinpeacefulfactionarea: true
disablespellinallfactionarea: false
disablespellinfactionsafezone: true
disablespellsinalltowns: false
disablespellsinnonpvptowns: true
useworldlist: false
Worlds:
- world
- world_nether
- world_the_end